2623221 has 12 divisors (see below), whose sum is σ = 3882060. Its totient is φ = 1705920.

The previous prime is 2623217. The next prime is 2623223. The reversal of 2623221 is 1223262.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 2387025 = 486^2 + 1545^2 .

It is not a de Polignac number, because 2623221 - 2² = 2623217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2623194 and 2623203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2623223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3186 + ... + 3923.

It is an arithmetic number, because the mean of its divisors is an integer number (323505).

2^2623221 is an apocalyptic number.

It is an amenable number.

2623221 is a deficient number, since it is larger than the sum of its proper divisors (1258839).

2623221 is a wasteful number, since it uses less digits than its factorization.

2623221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156 (or 7153 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 2623221 is about 1619.6360702331. The cubic root of 2623221 is about 137.9150390711.

Adding to 2623221 its reverse (1223262), we get a palindrome (3846483).

The spelling of 2623221 in words is "two million, six hundred twenty-three thousand, two hundred twenty-one".